OCULUS Pentacam, Руководство по толкованию

Страница: 51 / 216

49
10.1.3 Strategy on how to go through the exams
The way I usually go through the exams is:
Î Look at anterior elevation first
Î Look at posterior elevation
Î
Look at the pachymetry and thickness distribution. Off-center distribution of corneal
thickness is highly suspicious
Î Look at the symmetry of both eyes. If one eye is abnormal, usually both eyes are abnormal
Î Look at curvature last
Note:
The above relates to elevation island patterns, not astigmatism. These numbers pertain to elevation
in the central and paracentral region in an island pattern.
10.2 Normal, astigmatic cornea
This 4 Maps Selectable display (Figure 58) shows a normal with-the-rule astigmatic cornea (both
anterior and posterior surfaces). The sagittal curvature appears normal as it would be expected
from the normal symmetric anterior elevation, and the pachymetry map reveals a normal thickness
with a normal pachymetry distribution.
DIAGNOSIS - normal astigmatic cornea
Figure 58: 4 Maps Selectable showing an astigmatic cornea
10 Screening for refractive surgery